<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色表格展示区域 -->
      <el-table :data="roleList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <!-- 定义作用域插槽 -->
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 第一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 第二级 第三级权限 -->
              <el-col :span="19">
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="序号"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleName"></el-table-column>
        <el-table-column label="操作" width="300px">
          <!-- 作用域插槽 -->
          <template slot-scope="scope">
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-edit"
              @click="log(scope)"
              >编辑</el-button
            >
            <el-button size="mini" type="danger" icon="el-icon-delete"
              >删除</el-button
            >
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 弹出权限对话框 -->
    <el-dialog
      title="提示"
      :visible.sync="showSetRightDialogVisible"
      width="30%"
    >
    <!-- 树形节点 -->
    <el-tree :data="rightList" :props="treeProps" show-checkbox default-expand-all node-key="id" :default-checked-keys="defKeys" ref="treeRef"></el-tree>

      <span slot="footer" class="dialog-footer">
        <el-button @click="showSetRightDialogVisible = false">取 消</el-button>
        <el-button type="primary"
           @click="allotRight">确 定</el-button
        >
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      roleList: [],
      // 控制分配权限对话框的显示和隐藏
      showSetRightDialogVisible: false,
      rightList: [],
      // 树形控件属性绑定对象
      treeProps: {
        children: 'children',
        label: 'authName'
      },
      defKeys: [],
      // 当前角色
      curRole: null
    }
  },
  created () {
    this.getRoleList()
  },
  methods: {
    async getRoleList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }

      this.roleList = res.data
      console.log(this.roleList)
    },
    async removeRightById (role, rightId) {
      const confirmInfo = await this.$confirm(
        '此操作将删除该权限, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch((err) => err)
      if (confirmInfo !== 'confirm') { return this.$message.info('取消了删除操作！') }

      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (res.meta.status !== 200) return this.$message.error('删除权限失败！')
      role.children = res.data
      this.$message.success('删除成功！')
    },
    // 展示分配权限对话框
    async showSetRightDialog (role) {
      this.curRole = role
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) return this.$message.error('获取权限列表失败！')
      this.rightList = res.data
      // 先置空
      this.defKeys = []
      this.getLeafKeys(role, this.defKeys)
      this.showSetRightDialogVisible = true
    },
    // 获取所有最下级ID
    getLeafKeys (node, arr) {
      if (!node.children) {
        return arr.push(node.id)
      }

      node.children.forEach(ele => this.getLeafKeys(ele, arr))
    },
    // 分配权限
    async allotRight () {
      this.showSetRightDialogVisible = false
      const ids = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]

      const strIds = ids.join(',')
      const { data: res } = await this.$http.post(`roles/${this.curRole.id}/rights`, {
        rids: strIds
      })
      if (res.meta.status !== 200) return this.$message.error('更新角色权限失败！')
      console.log(res.data)
      this.getRoleList()
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>
